describe('Storage proeprty names', () => {
  ["localStorage", "sessionStorage"].forEach(function(name) {
    test(function() {
      var storage = window[name];
      storage.clear();

      storage["name"] = "user1";
      assert_array_equals(Object.getOwnPropertyNames(storage), ['name']);
    }, "Object.getOwnPropertyNames on " + name + " Storage");

    test(function() {
      var storage = window[name];
      storage.clear();
      assert_array_equals(Object.getOwnPropertyNames(storage), []);
    }, "Object.getOwnPropertyNames on " + name + " storage with empty collection");
  });
});